Keystones — Lintel
Five GCSE retrieval questions · 19 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0053 in standard form
Answer: 5.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 19x + 84
Answer: (x - 7)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.65cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 24, 41, 16, 19, 29, what is the missing number?
Answer: 39